Mandarin Oriental Hotel Group, the upscale international hotel chain, said today that its Boston hotel and condominium complex will open in October.

Mandarin Oriental, Boston, on Boylston Street in Boston’s Back Bay had been scheduled to open in July. But a fire broke out in April on the fourth floor, causing smoke damage that required contractors to restore a handful of its 148 hotel rooms and its 16,000-square-foot spa and fitness center for condo owners and hotel guests.

While the fire was contained, custom-made stonework, cabinets, and carpets had to be reordered for the Mandarin, which will be the city’s most luxurious hotel.